Mine tragedy

Two blokes were walking across a farmer's property when they noticed a very
deep disused mine. They wondered how deep it was. There was a very heavy
old Holden motor nearby so they decided to push it into the mine and try to
guage by the noise how deep the mine was.

Having done so they were suddenly surprised to find a very angry billygoat
behind them which came rushing by. They managed to step aside only to find
the goat disappear down the mine.

The farmer then appeared and asked if they had seen his goat. They said that
the goat had come from nowhere then disappeared down the mine.

The farmer then said, "That's impossible, I had him tied up to a Holden motor".

Cheers

Doug